Every few minutes a reoccurring error appears in a notification window "The job could not be started".
There are no import jobs and the Desktop Application has no error's in the history tab.
This occurs when a Document is dropped into a "hotfolder" to be imported, this is not supported.
Go into the folder location specified in the error and delete the document if not needed, otherwise you can move it into a different location.
Its also possible that the document is corrupted, you may want to check this before attempting to re-import it else where.
Once the document is gone from the folder the error should no longer occur.